Key–value database

A key–value database is a type of data storage system that organizes information as pairs: a unique key and its corresponding value. Think of it like a digital dictionary where each word (key) maps to a definition (value). This structure allows for rapid retrieval, updating, and storage of data because accessing information is as simple as providing the key. Key–value databases are highly scalable and flexible, making them ideal for applications requiring quick access to large volumes of data, such as caching, session management, and real-time analytics.